WADA president Witold Banka calls for thorough investigation into Kalina Valieva's entourage after positive test

World Anti-Doping Agency (WADA) president Witold Banka says he wants Russian authorities to change the country's doping culture and conduct a thorough investigation into teenage figure skater Kamila Valieva's entourage, with any culprits to be banned for life.

The case is now with Russia's anti-doping agency, which must set up a hearing to decide Valieva's fate

She will compete in her short program on Tuesday, then in a free skating routine on Thursday

The IOC says no medal ceremony will take place if she finishes in the top three because of her positive test

The 15-year-old prodigy was cleared on Monday to compete in her next event at the Beijing Olympics by the Court of Arbitration for Sport (CAS) after a failed drugs test last December, although CAS did not rule on the doping case itself.

«The doping of children is evil and unforgivable, and the doctors, coaches and other support personnel who are found to have provided performance-enhancing drugs to minors should be banned for life, Mr Banka told Reuters.

»And personally I also think that they should be in prison," he said.

The case is now in the hands of the Russian Anti-Doping Agency (RUSADA), which has to set up a hearing to decide on the fate of Valieva, hot favourite for the women's singles gold medal in Beijing.

If WADA is not satisfied with RUSADA's report, it can appeal to CAS, which is sport's highest court.

«We demand that RUSADA completes a strong investigation into the entourage. We will also look into that and make sure that a proper investigation is carried out,» Mr Banka said.

RUSADA lifted Valieva's provisional suspension after she was notified of her positive test for a banned heart drug on February 8 — more than six weeks after the sample collection.

CAS